Question

class nine math help me to everyone ​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

m∠COB = 80°

Step-by-step explanation:

∠AOD and ∠COD are supplementary angles ⇒ m∠AOD + m∠COD = 180°     4x + 5x = 180°

9x = 180° ⇒ x = 20°

m∠AOD = 4(20) = 80°

∠AOD ≅ ∠COB (Verticals angles) ⇒ m∠AOD = m∠COB = 80°